It is common practice to chamfer the standard butt fusion around the diameter of the entrance during the installation of standard butterfly valves in plastic piping, so that the disc does not strike the pipe interior and can open completely (Picture 1). A compromise one does not have to accept when mounting the butterfly valve of type Z 414-A or Z 411-A. The DVS (German Welding Association) ...

A large manufacturer of printing ink needed a high purity piping system to produce a new prototype of ink. The DI Water System called for a continuous loop system and required strict adherence to a low TOC. Asahi's Purad PVDF Piping System was chosen due to its low leachout ratings and the ability of the zero deadleg valves to reduce the possibility of bacteria build-up within the loop. ...

Geosythetic lining works include the installation of a 1,825m2 of 1.5mm smooth HDPE liner over the concrete roof of one existing and one new reservoir. Works included Fusion and extrusion welding techniques Sealing of HDPE liner to vertical concrete surface of 6nr. access hatches using a stainless steel battening system Fabrication and sealing of 16 nr. pipe boots around ...

The most common method for repairing leaking joints is hot gas welding at the fillet formed by the fitting socket entrance and the pipe. Hot gas welding of thermoplastics piping system joints is quite similar to the acetylene welding or brazing process used with metals. The fundamental differences are that the plastic rod must always be the same material as the pieces to be joined and heated gas, ...

For basic pressure management or more advanced modulating pressure management, water suppliers create a network of District Metered Areas (DMA’s) or smaller, more manageable pressure management zones. The DMA or pressure zone gives the ability to measure flow and control pressure, when a Pressure Reducing Valve (PRV) ...

Kent’s Longfield Academy will harness the natural power of the sun and earth to give the academy full marks for renewable energy performance. The new academy building for 1150 students, due to open in June 2011, is combining ground source heat pumps, which harness solar energy absorbed by the earth, with solar thermal technology to maximise renewable energy efficiency. By working in ...

Tool modifications enable quick mobilization on West Africa project Subsea repair of pipelines in deepwater is a complex and challenging operation that involves the use of remotely operated vehicles (ROVs) to deploy specialized tooling, clamps, and connectors. Pipeline repair also requires the engineering, logistics, and deployment of a range of other equipment, including pipe lift ...

Automatic control valves, much like everything else we purchase these days, are not all created equal. Some fall into the high quality bracket with pricing to match, while others hover closer to the lower quality and price sensitive end of the scale. Unfortunately, when evaluating control valve prices, it is not always clear what you are being offered ...

Thermo Fisher Scientific, Inc. exhibited its Next-Gen Mining portfolio during MINExpo 2012 in Las Vegas, September 24-26. The company’s highly integrated range of instruments, equipment and consumables, anchored by its industry-leading laboratory information management systems (LIMS), is the only offering that addresses all segments of the mining process, from early stage exploration ...

I have reached the conclusion, as a lot of you may relate too, that I may be considered one of those “cranky old men”. It shows itself in the little things. Sentences starting with the phrase “when I was your age” or ...

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